What is the temperature 128 K expressed in degrees Fahrenheit (just the number with two decimal places)?
Answers
Answer:
-229.27°
Explanation:
(128K − 273.15) × 9/5 + 32 = -229.3°F
Related Questions
calculate the mass of 0.8 moles of Fe(NO3)3 (H2O)9
Answers
Answer:
Molar mass of (Fe(NO3)3)(H2O)9 is 403.9972 g/mole
Explanation:
the formula to find the mass of moles
Worked Example: molar mass = mass ÷ moles (M=m/n) Calculate the molar mass of a pure substance if 1.75 moles of the substance has a mass of 29.79 g.
i think it help you
From the list below,choose which groups are part of the periodic table?
Answers
From the list provided, the following groups are part of the periodic table are Metals, Nonmetals , Semimetals and Conductors .
Metals: Metals are a group of elements that are typically solid, shiny, malleable, and good conductors of heat and electricity. They are located on the left-hand side and middle of the periodic table.
Nonmetals: Nonmetals are elements that have properties opposite to those of metals. They are generally poor conductors of heat and electricity and can be found on the right-hand side of the periodic table.
Semimetals: Semimetals, also known as metalloids, are elements that have properties intermediate between metals and nonmetals. They exhibit characteristics of both groups and are located along the "staircase" line on the periodic table.
Conductors: Conductors are materials that allow the flow of electricity or heat. In the context of the periodic table, certain metals and metalloids are good conductors of electricity.
Therefore, the groups that are part of the periodic table are metals, nonmetals, semimetals, and conductors. The other groups mentioned, such as acids, flammable gases, and ores, are not specific groups found on the periodic table but may be related to certain elements or compounds present in the table.
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The complete question is :
From the list below, choose which groups are part of the periodic table.
metals
acids
flammable gases
nonmetals
semimetals
ores
conductors
What is the oxidizing agent in the reaction Fe+AgNO3-->Fe(NO3)3+AG?
A.AgNO3+
B. fe
C.Ag
D. Fe(NO3)3
Answers
The oxidizing agent in the reaction Fe + \(AgNO_3\)→ \(Fe(NO_3)_3\) + Ag is option a \(AgNO_3.\)
A redox reaction is one in which the oxidation states of two species undergo changes. Iron is oxidized in the reaction, while silver nitrate is reduced. One of the reactants is being reduced, whereas the other is being oxidized.The oxidizing agent is the species that is being reduced, and it is the species that accepts electrons.
Fe is being oxidized in this reaction. Therefore, it cannot be the oxidizing agent, nor can\(Fe(NO_3)_3\). In contrast, \(AgNO_3.\) is being reduced, which means it is accepting electrons. This is why\(AgNO_3.\) is the oxidizing agent.The correct answer is option a.
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(Please Help)
1.What is the most common isotope for element X
2.Calculate the average atomic mass or element X
Answers
Answer:
1. Isotope 2 occurs most commonly
2. 39.02amu
Explanation:
1. Isotope 2 has a relative abundance of 78.68% i.e. 78.68 out of 100, hence, it is the isotope that occurs most commonly.
2. Isotope 1 = 9.67%, mass no: 38
Isotope 2 = 78.68%, mass no: 39
Isotope 3 = 11.34%, mass no: 40
Isotope 4 = 0.31%, mass no: 41
To find the average atomic mass of element X, we multiply each isotopes' relative abundance by its mass no and find the sum as follows:
We convert each percentage to decimal abundance:
Isotope 1 = 9.67% = 0.0967
Isotope 2 = 78.68% = 0.7868
Isotope 3 = 11.34% = 0.1134
Isotope 4 = 0.31% = 0.0031
(0.0967 × 38) + (0.7868 × 39) + (0.1134 × 40) + (0.0031 × 41)
3.6746 + 30.6852 + 4.536 + 0.1271
Average atomic mass = 39.02amu
Which location represents a period on a periodic table?.
Answers
11. A solution is made that is 3.7 m. If 211.0 grams of water were used, how many moles of
the solute were used?
Answers
The 7 moles of solute were used for a solution is made that is 3.7 m.
What is moles ?
Chemists use the mole as a key unit of measurement. In the same way that having a dozen eggs means you have twelve eggs, having a mole of anything means you have 602,214,076,000,000,000,000,000 of that specific object. Mole units are used by chemists to quantify extremely small substances, such as atoms, molecules, or other particles.
What is solution ?
A solution is a homogeneous mixture of two or more substances in their relative amounts in chemistry. A solution can be continuously changed up to what is known as the limit of solubility. Despite the fact that the term "solution" is commonly used to describe the liquid state of matter, solutions of gases and solids are also possible.
Therefore, 7 moles of solute were used for a solution is made that is 3.7 m.
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When comparing bromine to chlorine, bromine has
A. Fewer protons in its nucleus.
B. A weaker effective nuclear charge
C. More valence electrons
D. More electron shielding
Answers
Explanation:
I'm pretty sure the answer is D
in space why is it black in space except the planets
Answers
Answer:
because space is near-perfect vacuum - meaning it has exceedingly few particles- there is virtually nothing in the space between stars and planets to scatter light to our eyes
Directions: Answer the following questions in your own words using complete sentences. Do not copy and paste from the lesson or the internet.
1. How does the condition of the soil impact all aspects of the environment?
2. Conduct research on an extinct species. Identify the species, discuss the reasons for extinction, and how the extinction may have impacted the environment.
3. Conduct research on a threatened or endangered species. Identify the species, discuss the threats to the species, and any attempts to save the species. The species may be plant or animal.
4. Locate a park or other natural space near your home. Explain what type of natural space it is, when and how it was established, and the major purpose of the space.
5. What impact does it have on the environment if one type of biome is damaged or under threat?
Answers
Answer:
This took forever T-T
Explanation:
1. The condition of the soil has a big impact on the environment. Good soil helps plants grow, supports different kinds of life, and prevents erosion. It also keeps nutrients in balance and affects the quality of water and air. If the soil is unhealthy or polluted, it can harm plants, animals, and the overall ecosystem.
2. The dodo bird is an example of a species that no longer exists. It used to live on an island called Mauritius. Sadly, people hunted the dodo bird for food and destroyed its habitat. They also introduced other animals that harmed the dodo bird's population. Because of these reasons, the dodo bird became extinct. This affected the environment because the dodo bird played a role in spreading seeds and helping plants grow.
3. The Sumatran orangutan is a species in danger of disappearing. Its biggest threats are losing its home due to forests being cut down for palm oil, illegal hunting, and being taken as pets. People are working to protect the orangutans by preserving their habitat, rescuing and rehabilitating them, and educating communities about their importance.
4. Central Park in New York City is a natural area created in 1857. It was made for people to enjoy nature in the middle of the city. People can do many outdoor activities there like walking, picnicking, and playing sports. The park is also home to various birds and animals, which adds to the city's biodiversity.
5. When a certain environment, like a forest or a desert, is damaged or in danger, it has a big impact on the whole ecosystem. Many different plants and animals depend on each other in these environments. If something harms or destroys their homes, it can lead to the loss of species, disruption of food chains, and less diversity. It can also affect important processes like water and carbon cycles, and even influence the climate. People who rely on these environments for resources and livelihoods are also affected. That's why it's important to protect and take care of these natural areas.
12. The weight of 45 mL of water is ___ g. 13. The weight of 2 liters of water is ___ g. Remember to convert 2 liters to milliliters. g
Answers
The weight of 45 mL of water is 45 grams. The weight of 2 liters of water is 2000 grams.These calculations are based on the density of water, which is approximately 1 gram per milliliter.
The density of water is approximately 1 gram per milliliter (g/mL) at standard temperature and pressure. Therefore, the weight of water can be calculated by multiplying the volume of water (in milliliters) by its density (in grams per milliliter).
For the first question, the volume of water is given as 45 mL. Since the density of water is 1 g/mL, the weight of 45 mL of water is simply 45 grams.
For the second question, we need to convert 2 liters to milliliters. There are 1000 milliliters in 1 liter, so 2 liters is equivalent to 2000 milliliters. Applying the same density of water (1 g/mL), the weight of 2 liters (2000 mL) of water is 2000 grams.
The weight of 45 mL of water is 45 grams, and the weight of 2 liters of water (converted to 2000 milliliters) is 2000 grams. These calculations are based on the density of water, which is approximately 1 gram per milliliter.
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What is a resistor?
1.A battery
2.A light bulb
3.A switch
Answers
Answer:2
Explanation:
what is the ph of a 0.005 m hcl solution? assume complete dissociation.
Answers
The pH of a 0.005 M HCl solution is 2.30 which means that the solution is acidic since the pH is less than 7.
HCl is a strong acid, which means it completely dissociates in water to form H⁺ and Cl⁻ ions. The concentration of H⁺ ions in the solution is equal to the concentration of the HCl solution since it completely dissociates. Using the formula pH=-log[H⁺], we can calculate the pH of the solution.
pH=-log(0.005) = 2.30
Therefore, the pH of a 0.005 M HCl solution is 2.30. This means that the solution is acidic since the pH is less than 7. The lower the pH, the more acidic the solution is. HCl is commonly used in many industrial processes, and understanding the pH of its solutions is important for controlling reactions and ensuring product quality.
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an atom in its ground state absorbs a single photon of light and then relaxes back to the ground state by emitting an infrared photon (1,200 nm) followed by an orange photon (600 nm). what is the wavelength of the photon that was absorbed initially
Answers
Wavelength of the photon of light and then relaxes back to the ground state by emitting an infrared photon (1,200 nm) followed by an orange photon (600 nm) that was absorbed initially is 400nm
Wavelength of the photon that was absorbed initially can be calculated as follows:
Photon's energy is inversely related to its wavelength.
E ∝ 1/λA
Given that the energy of the absorbed photon () equals the total energy of the photons released (E₁ +E₂).
Eₐ=E₁ +E₂
the relationship between E and λ,
1 = 1 + 1
λₐ λ₁ λ₂
1 = 1 + 1
λₐ 600x 10⁻⁹ 1200x 10⁻⁹
λₐ = 400nm
Therefore, the wavelength of the absorbed photon is 400 nm.
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Which of the following series of radioactive decays would convert Pa-234 to Ra-226?
A) beta, alpha, beta
D) beta, alpha, alpha
B) alpha, alpha
E) alpha, beta, gamma
C) beta, alpha, alpha, beta
Answers
The correct series of radioactive decays to convert Pa-234 to Ra-226 is beta, alpha, alpha (option D).
The decay process involves the emission of specific particles or radiation from the nucleus of an atom, resulting in the transformation of one element into another-
Beta decay (β-): Pa-234 undergoes beta decay, where a beta particle (electron) is emitted from the nucleus, resulting in the conversion of one neutron into a proton. This leads to the formation of U-234 (Uranium-234).
Alpha decay (α): U-234 undergoes alpha decay, where an alpha particle (consisting of two protons and two neutrons) is emitted from the nucleus. This results in the conversion of the nucleus to Th-230 (Thorium-230).
Alpha decay (α): Th-230 undergoes another alpha decay, emitting an alpha particle and transforming into Ra-226. This completes the series and converts Pa-234 to Ra-226.
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What factors decrease the transfer of thermal energy?
ASAP
Answers
Answer:
What 3 factors influence the amount of thermal energy in an object, and how do they each affect it? Mass, temperature, and phase. More mass, more Thermal Energy. Higher temperature, more Thermal Energy.
ASAP=abbreviation. As soon as possible. 'fill in your form and send it to us ASAP' More example sentences.
how many moles of h2o is equal to 2.1g of h2o
Answers
To determine the number of moles of H2O that is equal to 2.1g of H2O, we need to use the molecular weight of H2O, which is 18.015 g/mol.
We can use the following formula to calculate the number of moles:
moles = mass / molecular weight
Substituting the values we have:
moles = 2.1 g / 18.015 g/mol
moles = 0.1166 mol
Therefore, 2.1 g of H2O is equal to 0.1166 moles of H2O.
In a galvanic cell, a spontaneous redox reaction occurs. However,the reactants are separated such that the transfer of electrons isforced to occur across a wire. The resulting electricity ismeasured in volts (\rm V) and is the sum of the potentials of the oxidation andreduction half-reactions:
{E^\circ}_{\rm cell} = {E^\circ}_{\rm ox} + {E^\circ}_{\rm red}
A table of standard reduction potentials gives{E^\circ}_{\rm red}values for common half-reactions.
Reduction half-reaction E(\rm V)
\rm Ag^+{(aq)}+e^- \rightarrow Ag{(s)} 0.80
\rm Cu^{2+}{(aq)}+2e^- \rightarrow Cu{(s)} 0.34
\rm Ni^{2+}{(aq)}+2e^- \rightarrow Ni{(s)} -0.26
\rm Fe^{2+}{(aq)}+2e^- \rightarrow Fe{(s)} -0.45
\rm Zn^{2+}{(aq)}+2e^- \rightarrow Zn{(s)} -0.76
By reversing any of these reduction half-reactions, you getthe corresponding oxidation half-reaction, for which{E^\circ}_{\rm ox}has the opposite sign of{E^\circ}_{\rm red}.
Part A
Calculate the standard potential for thefollowing galvanic cell:
\rm Ni (s)~ | ~ Ni^{2+}{(aq)}~ | ~Ag^{+}{(aq)}~ |~ Ag {(s)}
Express your answer numerically involts.
{E^\circ}_{\rm cell}= \rm V
Answers
The standard potential for the given galvanic cell is 1.06 V.
To calculate the standard potential for the galvanic cell Ni(s) | Ni2+(aq) | Ag+(aq) | Ag(s), you need to follow these steps:
1. Identify the oxidation and reduction half-reactions:
Ni(s) → Ni2+(aq) + 2e- (oxidation half-reaction)
Ag+(aq) + e- → Ag(s) (reduction half-reaction)
2. Find the standard reduction potentials (E°red) for each half-reaction from the table:
E°red(Ni2+ + 2e- → Ni(s)) = -0.26 V
E°red(Ag+ + e- → Ag(s)) = 0.80 V
3. Reverse the oxidation half-reaction and find its standard potential (E°ox) by changing the sign of E°red:
E°ox(Ni(s) → Ni2+(aq) + 2e-) = 0.26 V
4. Calculate the standard potential for the galvanic cell (E°cell) using the formula E°cell = E°ox + E°red:
E°cell = 0.26 V + 0.80 V
5. Obtain the final answer:
E°cell = 1.06 V
So, the standard potential for the given galvanic cell is 1.06 V.
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favorite plant the dragon tree or the Dicentra tree
Answers
Answer:
dragon tree
Explanation:
they look pretty cool
Answer:
ooooo i like the dragan tree ^◡^
Explanation:
favorite plant the dragon tree or the Dicentra tree?
How many electrons do silicon and oxygen atoms need to form octets?
Answers
Answer:
We convert two lone pairs of electrons from each oxygen atom to a covalent bond, as seen in the SiO2 Lewis dot structure. As a result, the valence shells of both silicon and oxygen have eight electrons.
This is the process that cells reproduce and replace old or damaged cells.
Question 5 options:
Mitosis
Meiosis
Ribosomes
Cytokinesis
Answers
Didnndxbdbdn
desorption electrospray ionization and electrosonic spray ionization for solid- and solution-phase analysis of industrial polymers.
Answers
Desorption electrospray ionization (DESI) and electrosonic spray ionization (ESSI) are both techniques used for the analysis of industrial polymers, but they differ in their ionization mechanisms.
DESI is primarily used for solid-phase analysis. It involves the application of a high-voltage spray of charged solvent droplets onto the surface of the solid polymer sample. The impact of the charged droplets causes desorption of ions from the surface of the polymer into the gas phase, which can be subsequently ionized and detected by mass spectrometry. DESI allows for direct analysis of solid samples without extensive sample preparation.
On the other hand, ESSI is more suitable for solution-phase analysis of polymers. It utilizes ultrasonic waves to create a fine aerosol of the polymer solution. The aerosol is then subjected to electrospray ionization, where a high voltage is applied to generate ions from the droplets of the polymer solution. These ions are subsequently analyzed by mass spectrometry. ESSI is commonly used for the characterization of soluble polymers, providing information about their molecular weight, structure, and composition.
Both DESI and ESSI offer advantages in terms of their ability to analyze industrial polymers directly, allowing for rapid analysis and minimal sample preparation. However, it's worth noting that specific details and parameters may vary depending on the specific instrument setup and the characteristics of the polymer being analyzed.
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Student B sat down and wrote a description of the properties of a gaseous bromine at the particulate level.
1)The size of the molecules of the gas is small compared to the volume of the gas, but not negligible at low temperatures.
2)Molecules move at random and in a straight line. Movement in any axis of space is independent of the other two axes.
3) Molecules collide against each other and the walls of the container in an inelastic manner.
What is Student B describing?
Bromine as a real gas.
Bromine as a real gas.
Bromine as a liquid.
Bromine as a liquid.
Bromine as an ideal gas.
Bromine as an ideal gas.
Bromine as a solid.
Bromine as a solid.
Answers
Student B is describing bromine as an ideal gas.
So, the correct answer is C.
In their description, they mention three key properties of an ideal gas:
1) small molecule size compared to the gas volume, with size becoming significant at low temperatures, 2) molecules moving randomly and in straight lines with independence among axes, and 3) inelastic collisions between molecules and container walls.
These characteristics align with the assumptions made in the ideal gas model, rather than the properties of a real gas, liquid, or solid.
Hence the answer of the question is C.
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Which statement accurately describes an object's weight and mass?
A. Both its weight and its mass are the same everywhere in the
universe.
B. Its weight is the same everywhere in the universe, but its mass is
not.
C. Its weight changes with gravitational force, but its mass does not.
D. Its mass changes with gravitational force, but its weight does not.
Answers
The statement accurately describes an object's weight and mass is option C. Its weight changes with gravitational force, but its mass does not.
What is gravitational force ?Gravitational force is the force by which an object attracts other objects into its center of mass. Earth attracts every objects into the ground by gravitational pulling. That is why we are all standing on earth's surface.
The mass of an object is the total amount of it. It is fixed and does not change any where. However, the weight we experience on earth is due to the gravity. The weight of object is the product of the mass and acceleration due to gravity of the planet.
Weight of an object will vary from planet to planet with the change in the acceleration due to gravity. The weight we experience in moon is very less compared to that in earth. However our mass is constant. Hence, option C is correct.
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to ensure that the decolorization of crystal violet reaction takes place within the linear range of the crystal violet calibration curve, and that there is an excess of hydroxide ions, 10.0 ml of the stock solution of crystal violet is diluted twice. first, with 10.0e so ml of distilled water and then with 10.0 ml of 0.10 m naoh. what is the [oh-] in the final dilute solution?
Answers
A calibration curve is a regression model that uses the instrument's reaction to known standards to forecast the unknown concentrations of interest-related analytes.
How do you calculate calibration curve?
The formula will have the general form of y = mx + b, where m denotes the slope and b the y-intercept, as in y = 1.05x + 0.2.When making adjustments to measurements made on samples whose values are unknown, use the equation for the calibration curve.Solve for y (the "true" value) by substituting the measured value (x) into the equation. We have four milliliters of a 2.5 x 10–5 molar solution of crystal violet.the crystal violet kinetics process, too.Usually, adding sodium hydroxide in much larger amounts causes the violet color to fade.You must now add the two of them together to complete this reaction.However, we're attempting to determine the crystal violet concentration prior to the reaction.Therefore, we are not attempting any story geometry; rather, we are attempting to determine the concentration of crystal violet at the start of the reaction.And it's not the crystal violet's concentration.We have four milliliters of a crystal violet solution that is 2.5 x 10 n-5 molar in size.When doing a crystal violet kinetics reaction.The violet tint typically vanishes as you add sodium hydroxide in much bigger amounts.Currently, you need to add the two together in this particular reaction.However, we're looking for the crystal violet concentration just before the reaction starts.We are only attempting to determine the concentration of the crystal violet at the start of the reaction; we are not attempting to perform any stories geometry here.Furthermore, it is not the crystal violet's concentration.All of the components in that particular reaction become diluted when two substances are mixed together.So, when you combine two milliliters of sodium hydroxide solution with four milliliters of the crystal violet solution.The total of those volumes makes up your new volume.Therefore, the result of mixing them is a six-ml solution.Therefore, we must apply the equation polarity times volume is equivalent to mill, aren? T times volume here in order to get the concentration before any of the sodium hydroxide reacts.The number of moles remains constant because we haven't initiated the reaction yet, and it also remains constant in this location.We therefore have a 2.5 times 10 to 5 molar solution. Therefore, we have a 2.5 x 10-5 molar solution in a four milliliter volume.We are currently working on the new mill arat E.However, we are aware that the current volume of our system is six mL.We shall divide both sides by six to obtain the new milliarat E, and we will discover that the new polarity is 1.67 times 10 to the -5moles per liter.We diluted the crystal violet with our other solutions, which reduced the polarity.
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what phase is carbon dioxide in at 5 atm pressure and -20 C
Answers
Answer:
When a solid turns directly to a gas this is called sublimation. From the graph it can be seen if the pressure is raised to ~5 atm as the CO2 warms up, it will pass through its triple point.
Explanation:
Answer:If the pressure is raised to ~5 atm as the CO2 warms up, it will pass through its triple point.
Explanation:
what is the protons and where are they are located and their charge?
Answers
Answer:
positively charged
they are located in an atom in the nucleus
Explanation:
plato was right
Answer:
Protons are in the nucleus of an atom and their charge is positive.
Explanation:
I just know.
In terms of acids and bases, what does neutralization mean?.
Answers
Answer:
Neutralization is when the pH (power of hydrogen ions) of a solution is at 7 (considered neutral in the pH scale). This means it's neither acidic nor basic and is neutral. In order to neutralize an acidic solution, you pour in the same amount of a strong base. And in order to neutralize a basic solution, you pour in the same amount of a strong base.
A neutralization reaction will give you salt and water. A common neutralization reaction could be:
HCl (strong acid) + NaOH (strong base) ----> NaCl (Salt) + H2O (water)
The pH of the ocean is around 8.1, is the ocean considered a
buffer? Why or Why not?
Answers
Yes, the sea is considered a buffer.
A buffer is a solution that resists pH changes when acids or bases are added. The buffering capacity of the ocean allows it to maintain a relatively stable pH even when acids and bases are added.
The ocean's buffering capacity is primarily due to the presence of dissolved compounds such as bicarbonate (HCO3-) and carbonate (CO32-). These compounds act as both weak acids and bases, accepting and releasing hydrogen ions (H+) to maintain pH balance. When carbon dioxide (CO2) in the atmosphere dissolves in seawater, carbonic acid (H2CO3) is produced and decomposed into bicarbonate ions and hydrogen ions.
This transformation helps prevent a rapid drop in pH as excess hydrogen ions combine with carbonate ions to form bicarbonate ions, which can reduce overall acidity.
When alkali such as hydroxide ions (OH-) is added to the ocean, excess hydroxide ions combine with hydrogen ions to form water molecules, reducing alkalinity.
The presence of these dissolved compounds and their interconversion reactions stabilize the pH of the ocean, making it less susceptible to rapid changes in acidity or alkalinity. This buffering capacity is essential for the survival and maintenance of marine life, as many organisms are sensitive to changes in pH.
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the chemical equation for reduction of phosphorite Ca3(PO4)2
Answers
Answer:
The chemical equation is;
Ca3(PO4)2 + 8C ———> Ca3P2 + 8CO
Explanation:
Here, we are interested in writing a chemical equation that is useful in the reduction of phosphorite.
We should understand that to be able to reduce phosphorite, there is need for a reducing agent.
Solid carbon can be used here.
The products formed are shown in the equation as follows;
Ca3(PO4)2 + 8C ———> Ca3P2 + 8CO
indicate which orbitals overlap to form the π bond between the carbon atoms hcch
Answers
The π bond between the carbon atoms in HC≡CH is formed by the sideways overlap of their p orbitals.
The π bond between the carbon atoms in HC≡CH is formed by the sideways overlap of their p orbitals. Specifically, this overlap occurs between the unhybridized 2p orbitals of each carbon atom. In HC≡CH, both carbon atoms are sp-hybridized, and the remaining 2p orbitals on each carbon atom are responsible for forming the π bond. So, the orbitals that overlap to form the π bond in HC≡CH are the 2p orbitals on each carbon atom.This results in a linear arrangement of the atoms, with the two hydrogen atoms bonded to the carbon atoms at either end.
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